#include "wx/wxprec.h"

#include "wx/dcmemory.h"

#include <gdk/gdk.h>
#include <gtk/gtk.h>

//-----------------------------------------------------------------------------
// wxMemoryDC
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS( wxMemoryDC, wxWindowDC )

void wxMemoryDC::Init() {
  m_ok = false;
  m_cmap = gtk_widget_get_default_colormap();
  m_context = gdk_pango_context_get();
  // Note: The Sun customised version of Pango shipping with Solaris 10
  // crashes if the language is left NULL (see bug 1374114)
  pango_context_set_language( m_context, gtk_get_default_language() );
  m_layout = pango_layout_new( m_context );
  m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
}

wxMemoryDC::wxMemoryDC( wxDC *( dc ) )
  : wxWindowDC() {
  Init();
}

wxMemoryDC::~wxMemoryDC() {
  g_object_unref( m_context );
}

void wxMemoryDC::DoSelect( const wxBitmap& bitmap ) {
  Destroy();
  m_selected = bitmap;
  if( m_selected.Ok() ) {
    m_window = m_selected.GetPixmap();
    m_selected.PurgeOtherRepresentations( wxBitmap::Pixmap );
    m_isMemDC = true;
    SetUpDC();
  } else {
    m_ok = false;
    m_window = ( GdkWindow * ) NULL;
  }
}

void wxMemoryDC::SetPen( const wxPen& penOrig ) {
  wxPen pen( penOrig );
  if( m_selected.Ok() &&
      m_selected.GetDepth() == 1 &&
      ( pen != *wxTRANSPARENT_PEN ) ) {
    pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  }
  wxWindowDC::SetPen( pen );
}

void wxMemoryDC::SetBrush( const wxBrush& brushOrig ) {
  wxBrush brush( brushOrig );
  if( m_selected.Ok() &&
      m_selected.GetDepth() == 1 &&
      ( brush != *wxTRANSPARENT_BRUSH ) ) {
    brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  }
  wxWindowDC::SetBrush( brush );
}

void wxMemoryDC::SetBackground( const wxBrush& brushOrig ) {
  wxBrush brush( brushOrig );
  if( m_selected.Ok() &&
      m_selected.GetDepth() == 1 &&
      ( brush != *wxTRANSPARENT_BRUSH ) ) {
    brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  }
  wxWindowDC::SetBackground( brush );
}

void wxMemoryDC::SetTextForeground( const wxColour& col ) {
  if( m_selected.Ok() && m_selected.GetDepth() == 1 ) {
    wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
  } else {
    wxWindowDC::SetTextForeground( col );
  }
}

void wxMemoryDC::SetTextBackground( const wxColour &col ) {
  if( m_selected.Ok() && m_selected.GetDepth() == 1 ) {
    wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
  } else {
    wxWindowDC::SetTextBackground( col );
  }
}

void wxMemoryDC::DoGetSize( int *width, int *height ) const {
  if( m_selected.Ok() ) {
    if( width ) {
      ( *width ) = m_selected.GetWidth();
    }
    if( height ) {
      ( *height ) = m_selected.GetHeight();
    }
  } else {
    if( width ) {
      ( *width ) = 0;
    }
    if( height ) {
      ( *height ) = 0;
    }
  }
}
